DBm Conversion Chart - RFCEC

dBm Conversion Chart

1. The most common measurement of RF signal levels is: `dB over a miliwatt (dBm)'. 2. A signal level of '0 - dBm' equals '224 - millivolt (mV)' across '50 - ohm load'. 3. A '0 - dBm' signal level in 'Power' is:

a. Power (P) equals (=) Voltage (E) Squared divided (/) by Ohms ();

b. P = 224 mV x 224 mV / 50 = 50.176 mV / 50 = 1 milliwatt (mW). 4. The following table provides conversion from dB to other measurements.

dBm

+13 +12 +11 +10 +9 +8 +7 +6 +5 +4 +3 +2 +1

0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 -22 -23 -24 -25 -26 -27 -28 -29 -30 -31 -32 -33

dBmV

+60 +59 +58 +57 +56 +55 +54 +53 +52 +51 +50 +49 +48 +47 +46 +45 +44 +43 +42 +41 +40 +39 +38 +37 +36 +35 +34 +33 +32 +31 +30 +29 +28 +27 +26 +25 +24 +23 +22 +21 +20 +19 +18 +17 +16 +15 +14

dBV

+120 +119 +118 +117 +116 +115 +114 +113 +112 +111 +110 +109 +108 +107 +106 +105 +104 +103 +102 +101 +100 +99 +98 +97 +96 +95 +94 +93 +92 +91 +90 +89 +88 +87 +86 +85 +84 +83 +82 +81 +80 +79 +78 +77 +76 +75 +74

V/mV

1000 mV 891 mV 794 mV 707 mV 631 mV 562 mV 501 mV 447 mV 398 mV 355 mV 316 mV 282 mV 251 mV 224 mV 200 mV 178 mV 158 mV 141 mV 126 mV 112 mV 100 mV 89.1 mV 79.4 mV 70.7 mV 63.1 mV 56.2 mV 50.1 mV 44.7 mV 39.8 mV 35.5 mV 31.6 mV 28.2 mV 25.1 mV 22.4 mV 20.0 mV 17.8 mV 15.8 mV 14.1 mV 12.6 mV 11.2 mV 10.0 mV 8.91 mV 7.94 mV 7079 V 6310 V 5623 V 5012 V

dBm

-34 -35 -36 -37 -38 -39 -40 -41 -42 -43 -44 -45 -46 -47 -48 -49 -50 -51 -52 -53 -54 -55 -56 -57 -58 -59 -60 -61 -62 -63 -64 -65 -66 -67 -68 -69 -70 -71 -72 -73 -74 -75 -76 -77 -78 -79 -80

dBmV

+13 +12 +11 +10 +9 +8 +7 +6 +5 +4 +3 +2 +1

0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 -22 -23 -24 -25 -26 -27 -28 -29 -30 -31 -32 -33

dBV

+73 +72 +71 +70 +69 +68 +67 +66 +65 +64 +63 +62 +61 +60 +59 +58 +57 +56 +55 +54 +53 +52 +51 +50 +49 +48 +47 +46 +45 +44 +43 +42 +41 +40 +39 +38 +37 +36 +35 +34 +33 +32 +31 +30 +29 +28 +27

V/mV

4467 V 3981 V 3548 V 3162 V 2818 V 2512 V 2239 V 1995 V 1778 V 1585 V 1413 V 1259 V 1122 V 1000 V 891 V 794 V 707 V 631 V 562 V 501 V 447 V 398 V 355 V 316 V 282 V 251 V 224 V 200 V 178 V 158 V 141 V 126 V 112 V 100 V 89.1 V 79.4 V 70.7 V 63.1 V 56.2 V 50.1 V 44.7 V 39.8 V 35.5 V 31.6 V 28.2 V 25.1 V 22.4 V

dBm

-81 -82 -83 -84 -85 -86 -87 -88 -89 -90 -91 -92 -93 -94 -95 -96 -97 -98 -99 -100 -101 -102 -103 -104 -106 -107 -108 -109 -110 -111 -112 -113 -114 -115 -116 -117 -118 -119 -120 -121 -122 -123 -124 -125 -126 -127

dBmV

-34 -35 -36 -37 -38 -39 -40 -41 -42 -43 -44 -45 -46 -47 -48 -49 -50 -51 -52 -53 -54 -55 -56 -57 -58 -59 -60 -61 -62 -63 -64 -65 -66 -67 -68 -69 -70 -71 -72 -73 -74 -75 -76 -77 -78 -79

dBV

+26 +25 +24 +23 +22 +21 +20 +19 +18 +17 +16 +15 +14 +13 +12 +11 +10 +9 +8 +7 +6 +5 +4 +3 +2 +1

0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19

V/mV 20.0 V 17.8 V 15.8 V 14.1 V 12.6 V 11.2 V 10.0 V 8.91 V 7.94 V 7.07 V 6.31 V 5.62 V 5.01 V 4.47 V 3.98 V 3.55 V 3.16 V 2.82 V 2.51 V 2.24 V

1.59 V

.759 V

.399 V

.200 V

.100 V

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